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This bulletin provides instructions for the proper

installation of the Quadrature speed sensor into HeavyDuty Hydrostatic piston motors. These instructions

should be followed carefully to prevent damage to thesensor and ensure proper operation.

As with any service procedure, care must

be taken to prevent any debris orcontamination from entering the motor.Prior to installing a new sensor into the

motor, thoroughly clean the motor endcover aroundthe sensor, and remove the old sensor.

Note

Some motors come equipped speed sensor ready(an O-ring plug is installed in the port instead of a sensor).Remove O-ring plug after cleaning the endcover as notedabove, then follow these instructions.

SpeedSensor Body

Alignment Nut

Lock Nut

WasherO-ring

AlignmentNotch

1) Rotate the motor shaftuntil a (gear/target) toothis centered in the speedsensor port. If this is notdone, the sensor may bedamaged during theoperation of the motor.(See Figure 1.)

Quadrature Speed Sensor for Heavy

Duty, Hydrostatic Fixed Displacement

Piston Motors

Installation Data Sheet

2) Make sure the lock nutand its threads are cleanand dry for the propertorque. Position the locknut against the alignmennut as shown in Figure

3) Move the washer and thO-ring up against thespeed sensor bodythreads as shown inFigure 2.

Shaft

Tooth

SpeedSensorPort

SpeedSensor

Figure

Figure 2Figure 1

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6) Maintain the speed sensorbody alignment (Figure 5)and tighten the lock nut to8,5 Nm [75-125 lb-in].

Torque values are for cleandry threads.

7) Check the speed sensorbody for correct alignment(Figure 5) and reinstall thesensor if it is not correct.

To verify that the speedsensor is installed properly,review the following steps:

A) Imagine holding themotor shaft in your handwith the port end of themotor pointing away fromyour body.

B) Rotate the motor suchthat the speed sensor ispointing straight up.

C) The alignment notchshould be pointingdirectly to your right.

D) The sensor alignmentnotch should be

perpendicular to themotor shaft centerline +/-5 degrees.

Eaton14615 Lone Oak Road

Eden Prairie, MN 55344

USATel: 952 937-9800

Fax: 952 974-7722

www.hydraulics.eaton.com

Eaton20 Rosamond Road

Footscray

Victoria 3011Australia

Tel: (61) 3 9319 8222

Fax: (61) 3 9318 5714

EatonDr.-Reckeweg-Str. 1

D-76532 Baden-Baden

GermanyTel: (49) 7221 682-0

Fax: (49) 7221 682-788

2003 Eaton CorporationAll Rights ReservedPrinted in USADocument No. E-MOPI-TI002-EMarch 2003

Back out

SpeedSensorBody

AlignmentNut

4) By hand, lightly thread thespeed sensor body to thehousing until the sensortouches against the motor(shaft) tooth. Use ofexcessive force willdamage the sensor. Makesure the O-ring and thewasher are not touchingthe housing, see Figure 3.

5) Back out the speed sensorbody one quarter turn(CCW) plus the additionalamount (CCW) needed tomake the sensor alignmentnotch point to your right(when viewing from theshaft end of the motor withthe sensor pointing straightup). The speed sensor mustbe backed out (turned CCWfrom the (shaft)) tooth nomore than 1-1/4 turns max.(450 degrees). The sensoralignment notch should beperpendicular to the motorshaft +/- 5 degrees(Figures 4 and 5).

90

ShaftEnd

Port End

Alignment Notch

Figure 5

Perpendicular toCenterline of Motor

Alignment Nut

5/8 inchHex Head

Lock Nut

3/4 inchHex Head

Parallelwit

h

Centerl

ineofMoto

rShaft

Figure 5

Figure 4Figure 3